@article{026054508, title = "Upper Trinity micro-fossils from southern Oklahoma", author = "Vanderpool, H.C.", year = "1933", journal = "Jour Paleontol", volume = "7", number = "4", pages = "406-411", doi = "10.2307/1298263", url = "https://eurekamag.com/research/026/054/026054508.php" }